The humble Mackerel is such a great fish to eat when fresh and has such a distinct flavour. Unless I’m hauling them in from a beach and barbecuing whole as the sun sets, I like to filet them and marinade. This one is basically just a honey and mustard glaze with some added Tahini paste – it really works. You can serve with any number of accompaniments but Cous-cous is always a winner. Just add spring onions, feta cheese and parsley to give it colour and a little bite.